Estudo comparativo da flarefotometria em pacientes com melanoma maligno e nevo de coróide

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Date
2002-01-01Author
Ballalai, Priscilla Luppi [UNIFESP]
Erwenne, Clélia Maria [UNIFESP]
Chojniak, Martha Motono
Type
ArtigoISSN
0004-2749Is part of
Arquivos Brasileiros de OftalmologiaDOI
10.1590/S0004-27492002000100006Metadata
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Comparative study of flare photometry in patients with choroidal malignant melanoma and choroidal nevusAbstract
Introduction: Malignant intraocular tumors are associated with an increase in the aqueous flare, caused by alterations of the blood-ocular barriers through various mechanisms. Several studies have demonstrated an ocular flare increase using flare photometry in eyes with benign and malignant tumors. Purpose: To evaluate flare photometry as an adjunct method in the differential diagnosis of choroidal malignant melanoma and choroidal nevus comparing to normal control eyes. Methods: Eyes with melanoma and nevus were diagnosed by indirect binocular ophthalmoscopy and/or ultrasound were evaluated. The fellow normal eyes were used as a control. In all subject and control eyes flare photometry was performed using the Laser Flare Meter (FC 500, Kowa), under mydriasis. Statistical analysis was done using the Wilcoxon, Mann-Whitney, and Spearman tests. Results: Thirty-one eyes with malignant melanoma and 18 eyes with nevus were evaluated. The flare photometry average in the eyes with malignant melanoma was 17.1 ph/ms and in the control fellow eyes it was 4.06 ph/ms. In eyes with choroidal nevus the flare photometry average was 6.12 ph/ms and in the control fellow eyes it was 4.47 ph/ms. The flare photometry was higher in eyes with malignant melanoma and nevus than in the fellow normal eyes (p<0.001 and p<0.01). Comparing the eyes with malignant melanoma and nevus, flare photometry was significantly higher in eyes with malignant melanoma (p<0.001). There was a positive correlation between the tumor thickness and flare photometry (r=0.47). Conclusion: Flare photometry is a helpful tool in the differential diagnosis of malignant melanoma and choroidal nevus. Introdução: Os tumores malignos intra-oculares estão associados com um aumento do flare na câmara anterior, causado por uma quebra na barreira hemato-aquosa, que pode ocorrer por vários mecanismos. Estudos utilizando a flarefotometria confirmam o aumento do flare em olhos com tumores intra-oculares malignos e benignos. Objetivo: Avaliar a flarefotometria como auxiliar no diagnóstico diferencial de melanoma maligno e nevo de coróide, comparando-se com olhos contralaterais normais. Métodos: Foram avaliados olhos com melanoma maligno e olhos com nevo de coróide diagnosticados por meio de oftalmoscopia indireta e/ou ultra-sonografia. Os olhos normais contralaterais foram utilizados como controles. A flarefotometria foi realizada em todos os pacientes, sob midríase bilateral, utilizando equipamento Laser Flare Meter (FC 500, Kowa). Foram aplicados os testes de Wilcoxon, Mann-Whitney, e Spearman para análise estatística. Resultados: A média da flarefotometria nos olhos com melanoma maligno de coróide foi 17,1 ph/ms e nos olhos normais contralaterais foi 4,06 ph/ms. Nos olhos com nevo de coróide o valor da flarefotometria foi 6,12 ph/ms e nos olhos contralaterais normais foi 4,47 ph/ms. O valor da flarefotometria foi maior nos olhos com melanoma maligno e nevo quando comparado com os olhos contralaterais normais (p<0,001 e p<0,01). Nos olhos com melanoma maligno o valor da flarefotometria foi significantemente maior que nos olhos com nevo de coróide (p<0,001). Foi observada correlação positiva entre a espessura do tumor e a flarefotometria (r=0,47). Conclusão: A flarefotometria é um exame útil no diagnóstico diferencial entre melanoma maligno e nevo de coróide.
Citation
Arquivos Brasileiros de Oftalmologia. Conselho Brasileiro de Oftalmologia, v. 65, n. 1, p. 31-35, 2002.Keywords
MelanomaChoroid neoplasms
Nevi and melanomas
Lasers
Photometry
Comparative study
Differential diagnosis
Blood-aqueous barrier
Melanoma
Neoplasias da coróide
Nevos e melanomas
Lasers
Fotometria
Estudo comparativo
Diagnóstico diferencial
Barreira hemato-aquosa
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